Shelf Safe Milk does not need to be refrigerated until it is opened. Although it is convenient, there is some concern that this Grade A milk contains less protein than regular milk. Independent random...

Shelf Safe Milk does not need to be refrigerated until it is opened. Although it is convenient, there is some concern that this Grade A milk contains less protein than regular milk. Independent random samples of 8-ounce servings of Shelf Safe Milk and regular milk were obtained, and the amount of protein (in grams) in each was measured. The summary statistics are given in the following table.